Comments
provided by eFloras
In the flora area, Machaeranthera tagetina occurs in southern and central Arizona and southwestern New Mexico, in the Chihuahuan and Sonoran desert regions. Much of its range in those states overlaps with that of M. tanacetifolia. In southern and central Arizona, the two species occasionally hybridize.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Annuals, 5–50 cm. Leaves 5–40 × 3–17 mm. Involucres broadly turbinate, 5–10 mm. Phyllaries 24–44 in 3–5 series, lanceolate to linear-lanceolate, 4–9 × 0.7–1.5 mm, apices usually appressed, sometimes spreading, acute to acuminate. Receptacles convex, 2–3.5 mm diam. Ray florets 8–16; laminae 6–15 × 1–3 mm. Disc florets 14–40(–45); corollas 4–7 mm, glabrous or glabrate; lobes 0.7–1 mm, hairy (hairs multicellular), 0.2–0.5 mm. Cypselae 2–3.5(–4) mm; pappi 2–8 mm. 2n = 8.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Aster tagetinus (Greene) S. F. Blake; Machaeranthera humilis (A. Gray) Standley; M. tanacetifolia Kunth var. humilis A. Gray
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- cc-by-nc-sa-3.0
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA